🎁Answer and gift🎁

🎉1500 degen for 20 people🎉

🎉500 degen for 2 people🎉

✔️1:❤️ +♻️ + answer

✔️2:mention 3 friends

✔️3:qoute (🎁gift box)

QUESTION:👇

Which of the following technologies is widely used in digital currencies to verify transactions and increase security❓

Student of business administration 💻
Investor 🤑


Interested in programming💻
 Bitcoin fan💵
 Amateur trader💱
 Interested in analysis⌨️A programmer passionate about Bitcoin

@mobaraei1997 @rezra @lemi0511 
Answer is c 
Good luck